Influence of Gas Sparging Intermittence on Ultrafiltration Performance of Anaerobic Suspensions

详细信息    查看全文

• 作者：Luisa Vera ; Enrique González ; Ignacio Ruigómez ; Jenniffer Gómez ; Sebastián Delgado
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：April 27, 2016
• 年：2016
• 卷：55
• 期：16
• 页码：4668-4675
• 全文大小：544K
• 年卷期：0
• ISSN：1520-5045

文摘

A novel strategy for membrane fouling control based on combination of intermittent gas sparging and transmembrane pressure set-point (TMP_sp) for backwashing initiation was assessed at laboratory scale. Ultrafiltration of anaerobic suspensions, complex and highly concentrated, was carried out at supracritical permeate fluxes and different TMP_sp values. Intermittent gas sparging effectively mitigated reversible fouling mainly caused by a cake layer formed of large particles, regardless of the selected TMP_sp. In fact, cycle duration increased with dimensionless gas-sparging time (Θ_gs) and TMP_sp, although this trend diminished with rising permeate flux (J_p). Additionally, backwashing initiation by TMP_sp demonstrated its high effectiveness in preventing residual fouling, independent of the applied conditions (Θ_gs, J, and TMP_sp). As a result, high net permeate fluxes were obtained at moderate J and low Θ_gs values. Therefore, the applied combined strategy is a promising option for reducing gas consumption that should contribute to a sustainable operation of anaerobic membrane bioreactors.